The third book of the Girl and Her Night Fury series: In the middle of preparing for the Viking winter holiday of Snoggletog for the first time with dragons, all the dragons inexplicably fly away on a mass migration, except for Toothless, so Hiccup gave him something to help.

The second book of the Girl and Her Night Fury series: Hiccup and her friends accompanying their mentor, Gobber, on a quest to kill the legendary Boneknapper Dragon. But is the Boneknapper real? Or is it just a legend?